%0 Journal Article %A A. V. Lasunsky %T Refinement of estimates for the Lyapunov exponents of a class of linear nonautonomous systems of difference equations %J Trudy Instituta matematiki i mehaniki %D 2020 %P 84-90 %V 26 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/TIMM_2020_26_3_a7/ %G ru %F TIMM_2020_26_3_a7